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Theorem algcvga 16541

Description: The countdown function 𝐶 remains 0 after 𝑁 steps. (Contributed by Paul Chapman, 22-Jun-2011.)

**Hypotheses**
Ref	Expression
algcvga.1	⊢ 𝐹:𝑆⟶𝑆
algcvga.2	⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
algcvga.3	⊢ 𝐶:𝑆⟶ℕ₀
algcvga.4	⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
algcvga.5	⊢ 𝑁 = (𝐶‘𝐴)

**Assertion**
Ref	Expression
algcvga	⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Distinct variable groups: 𝑧,𝐶 𝑧,𝐹 𝑧,𝑅 𝑧,𝑆 Allowed substitution hints: 𝐴(𝑧) 𝐾(𝑧) 𝑁(𝑧)

Proof of Theorem algcvga Dummy variables 𝑘 𝑚 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		algcvga.5	. . 3 ⊢ 𝑁 = (𝐶‘𝐴)
2		algcvga.3	. . . 4 ⊢ 𝐶:𝑆⟶ℕ₀
3	2	ffvelcdmi 7087	. . 3 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘𝐴) ∈ ℕ₀)
4	1, 3	eqeltrid 2832	. 2 ⊢ (𝐴 ∈ 𝑆 → 𝑁 ∈ ℕ₀)
5		nn0z 12605	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℤ)
6		eluz1 12848	. . . . 5 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) ↔ (𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾)))
7		2fveq3 6896	. . . . . . . . 9 ⊢ (𝑚 = 𝑁 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑁)))
8	7	eqeq1d 2729	. . . . . . . 8 ⊢ (𝑚 = 𝑁 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑁)) = 0))
9	8	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = 𝑁 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)))
10		2fveq3 6896	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑘)))
11	10	eqeq1d 2729	. . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑘)) = 0))
12	11	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = 𝑘 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0)))
13		2fveq3 6896	. . . . . . . . 9 ⊢ (𝑚 = (𝑘 + 1) → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘(𝑘 + 1))))
14	13	eqeq1d 2729	. . . . . . . 8 ⊢ (𝑚 = (𝑘 + 1) → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
15	14	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = (𝑘 + 1) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
16		2fveq3 6896	. . . . . . . . 9 ⊢ (𝑚 = 𝐾 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝐾)))
17	16	eqeq1d 2729	. . . . . . . 8 ⊢ (𝑚 = 𝐾 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝐾)) = 0))
18	17	imbi2d 340	. . . . . . 7 ⊢ (𝑚 = 𝐾 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
19		algcvga.1	. . . . . . . . 9 ⊢ 𝐹:𝑆⟶𝑆
20		algcvga.2	. . . . . . . . 9 ⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
21		algcvga.4	. . . . . . . . 9 ⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
22	19, 20, 2, 21, 1	algcvg 16538	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)
23	22	a1i 11	. . . . . . 7 ⊢ (𝑁 ∈ ℤ → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0))
24		nn0ge0 12519	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 0 ≤ 𝑁)
25	24	adantr 480	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → 0 ≤ 𝑁)
26		0re 11238	. . . . . . . . . . . . . . . . 17 ⊢ 0 ∈ ℝ
27		nn0re 12503	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℝ)
28		zre 12584	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℝ)
29		letr 11330	. . . . . . . . . . . . . . . . 17 ⊢ ((0 ∈ ℝ ∧ 𝑁 ∈ ℝ ∧ 𝑘 ∈ ℝ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
30	26, 27, 28, 29	mp3an3an 1464	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
31	25, 30	mpand 694	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 0 ≤ 𝑘))
32		elnn0z 12593	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ₀ ↔ (𝑘 ∈ ℤ ∧ 0 ≤ 𝑘))
33	32	simplbi2 500	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℤ → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
34	33	adantl 481	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
35	31, 34	syld 47	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
36	4, 35	sylan 579	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
37	36	impr 454	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘)) → 𝑘 ∈ ℕ₀)
38	37	expcom 413	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
39	38	3adant1 1128	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
40	39	ancld 550	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → (𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀)))
41		nn0uz 12886	. . . . . . . . . . . . 13 ⊢ ℕ₀ = (ℤ_≥‘0)
42		0zd 12592	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 0 ∈ ℤ)
43		id 22	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐴 ∈ 𝑆)
44	19	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐹:𝑆⟶𝑆)
45	41, 20, 42, 43, 44	algrf 16535	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ 𝑆 → 𝑅:ℕ₀⟶𝑆)
46	45	ffvelcdmda 7088	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘𝑘) ∈ 𝑆)
47		2fveq3 6896	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘(𝐹‘𝑧)) = (𝐶‘(𝐹‘(𝑅‘𝑘))))
48	47	neeq1d 2995	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) ≠ 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0))
49		fveq2 6891	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘𝑧) = (𝐶‘(𝑅‘𝑘)))
50	47, 49	breq12d 5155	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧) ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
51	48, 50	imbi12d 344	. . . . . . . . . . . . 13 ⊢ (𝑧 = (𝑅‘𝑘) → (((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)) ↔ ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘)))))
52	51, 21	vtoclga 3561	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
53	19, 2	algcvgb 16540	. . . . . . . . . . . . 13 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ↔ (((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))))
54		simpr 484	. . . . . . . . . . . . 13 ⊢ ((((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
55	53, 54	biimtrdi 252	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)))
56	52, 55	mpd 15	. . . . . . . . . . 11 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
57	46, 56	syl 17	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
58	41, 20, 42, 43, 44	algrp1 16536	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘(𝑘 + 1)) = (𝐹‘(𝑅‘𝑘)))
59	58	fveqeq2d 6899	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘(𝑘 + 1))) = 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
60	57, 59	sylibrd 259	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
61	40, 60	syl6 35	. . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
62	61	a2d 29	. . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
63	9, 12, 15, 18, 23, 62	uzind 12676	. . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0))
64	63	3expib 1120	. . . . 5 ⊢ (𝑁 ∈ ℤ → ((𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
65	6, 64	sylbid 239	. . . 4 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
66	5, 65	syl 17	. . 3 ⊢ (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
67	66	com3r 87	. 2 ⊢ (𝐴 ∈ 𝑆 → (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0)))
68	4, 67	mpd 15	1 ⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 ≠ wne 2935 {csn 4624 class class class wbr 5142 × cxp 5670 ∘ ccom 5676 ⟶wf 6538 ‘cfv 6542 (class class class)co 7414 1^st c1st 7985 ℝcr 11129 0cc0 11130 1c1 11131 + caddc 11133 < clt 11270 ≤ cle 11271 ℕ₀cn0 12494 ℤcz 12580 ℤ_≥cuz 12844 seqcseq 13990

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-cnex 11186 ax-resscn 11187 ax-1cn 11188 ax-icn 11189 ax-addcl 11190 ax-addrcl 11191 ax-mulcl 11192 ax-mulrcl 11193 ax-mulcom 11194 ax-addass 11195 ax-mulass 11196 ax-distr 11197 ax-i2m1 11198 ax-1ne0 11199 ax-1rid 11200 ax-rnegex 11201 ax-rrecex 11202 ax-cnre 11203 ax-pre-lttri 11204 ax-pre-lttrn 11205 ax-pre-ltadd 11206 ax-pre-mulgt0 11207

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-op 4631 df-uni 4904 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7865 df-1st 7987 df-2nd 7988 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-er 8718 df-en 8956 df-dom 8957 df-sdom 8958 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11468 df-neg 11469 df-nn 12235 df-n0 12495 df-z 12581 df-uz 12845 df-fz 13509 df-seq 13991

This theorem is referenced by: algfx 16542 eucalgcvga 16548

W3C validator